In one call, you hear the student whisper to the emergency operator that "Marjory Stoneman Douglas High School is being shot up." In another call, you can hear a parent on the phone with a child in the high school, telling the student to stay locked in a classroom and play dead.

As we reported ... Cruz has been charged with 17 counts of premeditated murder. The Parkland kids have since spearheaded efforts, including this month's March For Our Lives, to change gun laws.